python - 即使我在环境变量上添加了 pg_config 的路径，仍然出现错误 : pg_config executable not found.

Question

我正在尝试设置 saleor(基于 Django)。我按照网站上的说明做了“python -m pip install -r requests.txt”。一切进展顺利，直到安装 Collecting psycopg2-binary==2.8.3 然后抛出错误。我已经安装了 Postgre，并且在 Windows 上。我还在我的环境变量中添加了 pg_config 的路径，因为它显示 pg_config 可执行文件未找到。 我不知道如何继续。

这是显示的错误:

ERROR: Command errored out with exit status 1:
     command: 'C:\Users\ASPIRE\AppData\Local\Programs\Python\Python38-32\python.exe' -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\ASPIRE\\AppData\\Local\\Temp\\pip-install-d7c359c_\\psycopg2-binary\\setup.py'"'"'; __file__='"'"'C:\\Users\\ASPIRE\\AppData\\Local\\Temp\\pip-install-d7c359c_\\psycopg2-binary\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base 'C:\Users\ASPIRE\AppData\Local\Temp\pip-install-d7c359c_\psycopg2-binary\pip-egg-info'
         cwd: C:\Users\ASPIRE\AppData\Local\Temp\pip-install-d7c359c_\psycopg2-binary\
    Complete output (23 lines):
    running egg_info
    creating C:\Users\ASPIRE\AppData\Local\Temp\pip-install-d7c359c_\psycopg2-binary\pip-egg-info\psycopg2_binary.egg-info
    writing C:\Users\ASPIRE\AppData\Local\Temp\pip-install-d7c359c_\psycopg2-binary\pip-egg-info\psycopg2_binary.egg-info\PKG-INFO
    writing dependency_links to C:\Users\ASPIRE\AppData\Local\Temp\pip-install-d7c359c_\psycopg2-binary\pip-egg-info\psycopg2_binary.egg-info\dependency_links.txt
    writing top-level names to C:\Users\ASPIRE\AppData\Local\Temp\pip-install-d7c359c_\psycopg2-binary\pip-egg-info\psycopg2_binary.egg-info\top_level.txt
    writing manifest file 'C:\Users\ASPIRE\AppData\Local\Temp\pip-install-d7c359c_\psycopg2-binary\pip-egg-info\psycopg2_binary.egg-info\SOURCES.txt'

    Error: pg_config executable not found.

    pg_config is required to build psycopg2 from source.  Please add the directory
    containing pg_config to the $PATH or specify the full executable path with the
    option:

        python setup.py build_ext --pg-config /path/to/pg_config build ...

    or with the pg_config option in 'setup.cfg'.

    If you prefer to avoid building psycopg2 from source, please install the PyPI
    'psycopg2-binary' package instead.

    For further information please check the 'doc/src/install.rst' file (also at
    <http://initd.org/psycopg/docs/install.html>).

    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

感谢任何帮助。谢谢

Answer 1

问题是环境变量PATH不是set适本地。它用于查找不在当前目录中的可执行文件。

出于您的目的，您不必永久更改 PATH:

• 使用cmd.exe打开命令行(DOS 框)。

• 使用 PATH 查看当前设置。

• 使用以下命令更改当前 session 的值

  SET PATH="C:\Program Files\PostgreSQL\12\bin";%PATH%
  

现在应该可以工作了。

有一种方法可以在 Windows 上永久设置环境变量，但它们在不同版本之间隐藏得更好。网络搜索通常会有所帮助。